I worked on the mini for over 4 hours with Dell support. We erased the hard drive and replaced windows. we installed a new keyboard. i still can;t get the characters [ ] { } \ | or ~ ` they are sending a box today to take the unit back to look at it. I hope they can send me one that works. They said that they would also reinstall the Apple programs that they installed to make my computer work with my airport extreme router. they said there would be no charge. I wish i could learn to do this my self cause there are many reasons to want to make reinstalls my self.